Focus on Cellulose ethers

Kedu ihe ị maara gbasara Hydroxypropyl methyl cellulose?

Kedu ihe ị maara gbasara Hydroxypropyl methyl cellulose?

Hydroxypropyl methylcellulose (HPMC) bụ ether cellulose nke sitere na cellulose eke. Ọ bụ sịntetik, mmiri na-agbaze, polymer na-abụghị ionic nke a na-ejikarị eme ihe n'ụlọ ọrụ dị iche iche dị ka ihe owuwu, ụlọ ọgwụ, nri, ihe ịchọ mma, na textiles.

A na-emepụta HPMC site na iji kemịkal na-agbanwe cellulose na propylene oxide na methyl chloride iji webata hydroxypropyl na methyl n'ime molekul cellulose. Ogo nke nnọchi (DS) nke HPMC na-ezo aka ọnụ ọgụgụ nke hydroxypropyl na methyl otu kwa anhydroglucose unit (AGU) nke cellulose.

HPMC nwere ọtụtụ ihe na-eme ka ọ baa uru na ngwa dị iche iche. Ọ na-agbaze na mmiri, na-emepụta ngwọta doro anya, ma nwee nkwụsi ike dị mma. Ọ na-akwụsikwa ike n'okpuru ọnọdụ nkịtị nke okpomọkụ na pH na ọ naghị ere ngwa ngwa. HPMC bụ hygroscopic, nke pụtara na ọ nwere ike ịmịkọrọ na idowe mmiri mmiri. Ọ bụ ihe na-adịghị egbu egbu, nke na-adịghị ewe iwe, na nke na-adịghị ahụkebe, nke na-eme ka ọ dị mma maka iji ya mee ihe n'ọtụtụ ngwa.

N'ebe a na-ewu ihe owuwu, a na-eji HPMC eme ihe dị ka ihe nkpuchi, ihe nkedo, na ihe na-ejigide mmiri na ngwaahịa ndị sitere na ciment, nrapado tile, plasta, na ihe ndị ọzọ eji arụ ụlọ. Na ụlọ ọrụ na-emepụta ọgwụ, a na-eji HPMC mee ihe dị ka ihe nkedo, nke na-agbasasị, na onye na-eme ihe nkiri na mbadamba mbadamba na capsule. N'ụlọ ọrụ nri, a na-eji HPMC eme ihe dị ka thickener, emulsifier, na stabilizer na ngwaahịa dị iche iche. N'ihe ịchọ mma, a na-eji HPMC eme ihe dị ka ihe na-ekpu mmiri, onye na-eme ihe nkiri, na emulsifier na ude, lotions, na usoro ndị ọzọ.

N'ozuzu, HPMC bụ polymer bara uru na nke bara uru nke nwere ọtụtụ ngwa na ụlọ ọrụ dị iche iche n'ihi ihe ndị pụrụ iche ya.


Oge nzipu: Mar-17-2023
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